touch and go

例句：

1. 1. We should always be on standby for emergencies.
   我们应该随时待命以防紧急情况。
2. 2. The team is ready to go at a moment's notice.
   该团队随时待命，一有需要即可出发。
3. 3.She touched and went to the store without me.
   她一个人去了商店，没有带我。